The Speedmaster PCE550.1012 Input Planetary Kit is engineered for GM TH700R4, 4L60, and 4L70E automatic transmissions, featuring a heavy-duty 6-pinion design paired with a 2.84 ratio for improved load distribution and enhanced durability over the factory planetary assembly. The additional pinions help reduce stress on each individual gear, making this kit a smart upgrade for performance builds and demanding driving conditions.
This complete kit includes the sun gear, delivering a convenient all-in-one solution that simplifies the rebuild or upgrade process. Whether you are refreshing a worn transmission or building a high-performance drivetrain, the Speedmaster PCE550.1012 provides the reliability and performance your GM transmission demands.
